Collateral for a security interest recorded Jul 30, 2021 (Zilka Kotab, P.C.).
Term ends Jan 19, 2038 · High confidence
20-year base term ends Nov 16, 2037
Held by Duelight LLC
Filed Nov 16, 2017 as application 15/815,463 · Granted Nov 12, 2019
Base term plus 64 days of patent term adjustment (USPTO delay)
Today
2017
2038
Clock starts
Nov 16, 2017
Nov 16, 2017
Term ends
Jan 19, 2038
Jan 19, 2038
Granted
Nov 12, 2019
Nov 12, 2019
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
64
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
89
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 64 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Nov 16, 2017, when this application, 15/815,463, was filed | Nov 16, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +64 days, USPTO patent term adjustment record | Jan 19, 2038 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jan 19, 2038 | High confidence |
This family
| US 9,215,433 | Lapsed on the fee record Dec 2023 | Dec 2023 |
| US 9,807,322 | In force Mar 2034 | Mar 2034 |
| US 9,393,465 | In force Jun 2034 | Jun 2034 |
| US 9,741,150 | Lapsed on the fee record Aug 2025 | Aug 2025 |
| US 9,509,919 | Lapsed on the fee record Nov 2024 | Nov 2024 |
| US 10,088,989 | Lapsed on the fee record Oct 2026 | Oct 2026 |
| US 9,924,147 | In force Feb 2034 | Feb 2034 |
| US 9,776,056 | In force Apr 2034 | Apr 2034 |
8 of 89 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| May 4, 2018 Reel 45723, frame 715 | Rivard, William Guie; Kindle, Brian J.; Feder, Adam Barry | Duelight LLC | Assignment of Assignor's Interest |
| Jul 30, 2021 Reel 57043, frame 301 | Duelight, LLC | Zilka Kotab, P.c. | Security Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
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Alerts on its grants, lapses and transfers.
What's changing
Jan 2038
Term ends Jan 19, 2038. Maintenance fees still fall due before then
Note
The 64 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
72
later US patents cite this one
That is top 5% of utility patents granted in 2019 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.